clockevents: Add helpers to check the state of a clockevent device (3434d23b) · Commits · 戴 / test

Some clockevent drivers, once migrated to use per-state callbacks, need to check the state of the clockevent device in their callbacks or interrupt handler. Add accessor functions clockevent_state_*() to get this information. Signed-off-by:

Viresh Kumar <viresh.kumar@linaro.org> Cc: linaro-kernel@lists.linaro.org Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/04a717d490335c688dd7af899fbcede97e1bb8ee.1432192527.git.viresh.kumar@linaro.org Signed-off-by:

Thomas Gleixner <tglx@linutronix.de>

include/linux/clockchips.h

+26 −0

Original line number	Diff line number	Diff line
		@@ -149,6 +149,32 @@ struct clock_event_device {
		struct module *owner;
		} ____cacheline_aligned;

		/* Helpers to verify state of a clockevent device */
		static inline bool clockevent_state_detached(struct clock_event_device *dev)
		{
		return dev->state == CLOCK_EVT_STATE_DETACHED;
		}

		static inline bool clockevent_state_shutdown(struct clock_event_device *dev)
		{
		return dev->state == CLOCK_EVT_STATE_SHUTDOWN;
		}

		static inline bool clockevent_state_periodic(struct clock_event_device *dev)
		{
		return dev->state == CLOCK_EVT_STATE_PERIODIC;
		}

		static inline bool clockevent_state_oneshot(struct clock_event_device *dev)
		{
		return dev->state == CLOCK_EVT_STATE_ONESHOT;
		}

		static inline bool clockevent_state_oneshot_stopped(struct clock_event_device *dev)
		{
		return dev->state == CLOCK_EVT_STATE_ONESHOT_STOPPED;
		}

		/*
		* Calculate a multiplication factor for scaled math, which is used to convert
		* nanoseconds based values to clock ticks:

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